Dynabar is the best solution. They are in stock with all good kite shops now, and can be purchased online too at
www.kitepower.com.au/collections/kitesurfing/jayfactoryEven if that Dakine (and we sell Dakine) sliding idea worked it wears the webbing too quickly. I'm on a dynabar with rope, prowave version and its 2 full years old and still going strong, the fluid way it moves as you switch to toeside or switch stance is so smooth it makes your riding improve, it is much easier to make turns without the kite trying to pull you off the wave or off your board. Dynabar fits onto Dakine Harness.